ATE484118T1 - DEVICE AND METHOD FOR EVALUATION OF CONDITIONS OF PROPAGATION PATHS - Google Patents

DEVICE AND METHOD FOR EVALUATION OF CONDITIONS OF PROPAGATION PATHS

Info

Publication number
ATE484118T1
ATE484118T1 AT08764644T AT08764644T ATE484118T1 AT E484118 T1 ATE484118 T1 AT E484118T1 AT 08764644 T AT08764644 T AT 08764644T AT 08764644 T AT08764644 T AT 08764644T AT E484118 T1 ATE484118 T1 AT E484118T1
Authority
AT
Austria
Prior art keywords
concerning
transmitting
calculated
receiving
amplification factor
Prior art date
Application number
AT08764644T
Other languages
German (de)
Inventor
Yoneo Akita
Original Assignee
Tektronix Int Sales Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tektronix Int Sales Gmbh filed Critical Tektronix Int Sales Gmbh
Application granted granted Critical
Publication of ATE484118T1 publication Critical patent/ATE484118T1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Radio Transmission System (AREA)

Abstract

A measurement indicator, “transfer efficiency,” is provided for evaluating conditions of propagation paths of wireless communication systems having a plurality of transmitting and receiving antennas. Transfer functions of signal paths are calculated from data of received signals that are obtained with receiving antennas by receiving OFDM signals transmitted by transmitting antennas. A demodulation matrix is calculated for demodulating a transmitting vector from a receiving vector concerning a desired subcarrier of the received signals. A noise amplification factor is calculated as a square root of a sum of second powers of components of the demodulation matrix of the receiving antennas concerning the desired transmitting antenna. The noise amplification factor or the inverse is displayed as a value or as a graph that has an axis concerning the subcarrier and an axis concerning the noise amplification factor or the inverse.
AT08764644T 2007-05-18 2008-05-19 DEVICE AND METHOD FOR EVALUATION OF CONDITIONS OF PROPAGATION PATHS ATE484118T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007133132A JP2008288990A (en) 2007-05-18 2007-05-18 Device and method for evaluating state of propagation path
PCT/JP2008/059599 WO2008143353A2 (en) 2007-05-18 2008-05-19 Apparatus and method for evaluating conditions of propagation paths

Publications (1)

Publication Number Publication Date
ATE484118T1 true ATE484118T1 (en) 2010-10-15

Family

ID=40027463

Family Applications (1)

Application Number Title Priority Date Filing Date
AT08764644T ATE484118T1 (en) 2007-05-18 2008-05-19 DEVICE AND METHOD FOR EVALUATION OF CONDITIONS OF PROPAGATION PATHS

Country Status (7)

Country Link
US (1) US7995647B2 (en)
EP (1) EP2153567B1 (en)
JP (1) JP2008288990A (en)
CN (1) CN101682472B (en)
AT (1) ATE484118T1 (en)
DE (1) DE602008002929D1 (en)
WO (1) WO2008143353A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7706250B2 (en) 2005-09-23 2010-04-27 Litepoint Corp. Apparatus and method for simultaneous testing of multiple orthogonal frequency division multiplexed transmitters with single vector signal analyzer
US7822130B2 (en) * 2005-09-23 2010-10-26 Litepoint Corporation Apparatus and method for simultaneous testing of multiple orthogonal frequency division multiplexed transmitters with single vector signal analyzer
JP5150545B2 (en) * 2009-03-27 2013-02-20 西日本電信電話株式会社 Communication control device and communication control method
JP5285724B2 (en) 2011-02-17 2013-09-11 アンリツ株式会社 Mobile communication terminal test apparatus and mobile communication terminal test method
JP5521073B2 (en) * 2013-03-07 2014-06-11 アンリツ株式会社 Mobile communication terminal test apparatus and mobile communication terminal test method
US20150066401A1 (en) * 2013-09-04 2015-03-05 Abb Technology Ag State Estimation of Power Systems Decomposed Into Two or More Subsystems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1357714A1 (en) * 2002-04-23 2003-10-29 Siemens Information and Communication Networks S.p.A. Method and device for channel estimation in digital radio communication systems
US7184713B2 (en) * 2002-06-20 2007-02-27 Qualcomm, Incorporated Rate control for multi-channel communication systems
EP1912362B1 (en) * 2005-08-02 2011-04-20 Mitsubishi Electric Corporation Communication device, and radio communication system
JP5063883B2 (en) * 2005-09-29 2012-10-31 富士通株式会社 Wireless communication apparatus, transmission method, transmission apparatus, data transmission system, and data transmission method

Also Published As

Publication number Publication date
CN101682472B (en) 2013-04-24
US20080285672A1 (en) 2008-11-20
DE602008002929D1 (en) 2010-11-18
US7995647B2 (en) 2011-08-09
EP2153567A2 (en) 2010-02-17
EP2153567B1 (en) 2010-10-06
JP2008288990A (en) 2008-11-27
WO2008143353A2 (en) 2008-11-27
CN101682472A (en) 2010-03-24
WO2008143353A3 (en) 2009-04-16

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Legal Events

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